/* -*- c++ -*- */

/*

 * Copyright 2004,2006,2010 Free Software Foundation, Inc.

 * 

 * This file is part of GNU Radio

 * 

 * GNU Radio is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 3, or (at your option)

 * any later version.

 * 

 * GNU Radio is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 * 

 * You should have received a copy of the GNU General Public License

 * along with GNU Radio; see the file COPYING.  If not, write to

 * the Free Software Foundation, Inc., 51 Franklin Street,

 * Boston, MA 02110-1301, USA.

 */

#ifdef HAVE_CONFIG_H

#include "config.h"

#endif

#include <gr_pwr_squelch_ff.h>

gr_pwr_squelch_ff_sptr

gr_make_pwr_squelch_ff(double threshold, double alpha, int ramp, bool gate)

{

  return gnuradio::get_initial_sptr(new gr_pwr_squelch_ff(threshold, alpha, ramp, gate));

}

gr_pwr_squelch_ff::gr_pwr_squelch_ff(double threshold, double alpha, int ramp, bool gate) : 

        gr_squelch_base_ff("pwr_squelch_ff", ramp, gate),

        d_iir(alpha)

{

  set_threshold(threshold);

}

std::vector<float> gr_pwr_squelch_ff::squelch_range() const

{

  std::vector<float> r(3);

  r[0] = -50.0;                                // min        FIXME

  r[1] = +50.0;                                // max        FIXME

  r[2] = (r[1] - r[0]) / 100;                // step size

  return r;

}

void gr_pwr_squelch_ff::update_state(const float &in)

{

  d_pwr = d_iir.filter(in*in);

}